Paper-bag machine.



PATENTED APR. 18, 1905.

H. BLSAS. PAPER BAG MACHINE.

APPLICIATION FILED MAY 25. 1904.

7 SHEETS-SHEET l.

Kill

lllll I,

llllllll ill tllll No. 787,667. I PATENTED APR. 18 1905.

7 ELsAs. PAPER BAG MACHINE.

APPLIOATION FILED MAY 25. 1904.

v SHEETS-SHEET 2.

50 [72 we mar.- jfermarz Elsa;

Witnesses:

PATENTED APR. 18, 1905.

H. ELSAS. PAPERBAG MACHINE. APPLICATION FILED MA'Y 25. 1904.

7 SHEETS-SHEET 8.

lave tor. ffermaizlisas No. 787,667. PATENTED APR. 18, 1905.

H. ELSAS.

PAPER BAG MACHINE.

APPLICATION FILED MAY 25. 1904- 7 SHEETS-SHEET 4.

I Inventor. lfermrzi'lsa;

No. 787,667, I I PATENTED APR.18, 1905. H. ELSAS.

PAPER BAG MACHINE.

APPLICATION FILED MAY 25. 1904.

7 SHEETS-SHEET. 5.

I E J' i 3,. w!

I [72 Manta .Hrmanl'kas PATBNTED APR. 18, 1905.

H. BLSAS.

, PAPER BAG MAGHINE.

urmoumn mum my 25. 1904.

7 SHBIBTQ-BHEBT a.

PATENTED APR.18, 1905.

H. BLSAS. PAPER BAG MACHINE.

. APPLICATION nun MAY 25. 1904;

7 snug-sun? 'r.

15222622507? Hrmzm Elias Minesses UNITED STATES Patented April 18, 1905.

PATENT OFFICE.

HERMAN ELSAS, OF NEW YORK. N. Y., ASSIGNOR TO CONTINENTAL PAPER BAG COMPANY, A CORPORATION OF MAINE.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 787,667, dated April 18, 1905.

Application filed May 25, 1904. Serial No. 209,730.

To all whom it m/rr/ on/(367%:

Be it known that I, HERMAN ELsAs, a citi- Zen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Paper-Bag Machines, of which the following is a specification.

This invention pertains to paper-bag machines, and more especially to that class of paper-bag machines for making the so-called square-bottom paper bags from tubular blanks having an inwardly-folded tuck in each side thereof. My improvements relate particularly to those parts of such a paperbag machine as are provided to open out one end of the bag-blank and to fold the same into the well-known diamond fold.

' The object of my invention is to furnish means comprising but few parts and those of simple construction and which may be run with accuracy at high speeds for opening out the forward end of the tubular bag-blank and forming the diamond fold thereon. With this object in view 1 preferably employ a plurality of oscillatable folding-beds mounted upon a revoluble carrier and adapted for successive coaction with a cylindrical blankopener mountedfor vibration on its own axis and for oscillation over the path of the folding-beds. My invention is not, however, limited in its application to oscillatable foldingbeds mounted upon a revoluble carrier, but is equally applicable to such folding-beds mounted upon a reciprocating carrier,in which case the axis of my cylindrical blank-opener would be arranged to reciprocate instead of to oscillate, as in the present instance. My invention is also applicable to an oscillatable folding-bed mounted upon a stationary carrier.

The nature of my improvements may be best understood and described in connection with the drawings accompanying this specification, and in which- Figure 1 is a front elevation of so much of a paper-bag machine of the class specified as will suffice to illustrate one form of my improvements. Fig. 2 is .a side elevation, partly in section and looking in the direction of arrow a of Fig. 1. and with the parts to the right of line a a in said Fig. 1 removed. Fig. 3 is a side elevation similar to Fig. 2. but of the opposite side of the machine, looking in the direction of arrow 0 of Fig. 1 and with the parts to the left Of'line 0 ,0 in said Fig. 1 removed and with some other parts omitted. Figs. 4 to 9, both inclusive, areside elevations similar to that of Fig. 2, but not coextensive therewith, illustrating successive steps in the formation of the diamond fold. Fig. 10 is a detail sectional view on line dd of Fig. 2 looking in the direction of arrow d therein and illustrates the pivotal mounting of one of the folding-beds and its front clip. Fig.- l1 is a perspective view of the ironer with part of its supporting-bracket.

Similar characters of reference refer to like parts throughout the several figures of the drawings.

The present machine, in which is illustrated one form of my improvements and which may be its preferred form, may comprise the usual side frames, as 3 4, in which may be erected the various parts embodying my invention. Projecting inwardly from each of said frames is a tubular bearing3 as to frame 3 and 4 as to frame 4and on which tubular bearings or sleeves are mounted several fixed cams, oscillating arms, and other parts of my improvements. Also within said sleeves is revolubly mounted main shaft 2. Each of said sleeves is provided with a. flange3 as to sleeve 3 and 4 as to sleeve 4"whereby said sleeves may be secured by some suitable means, as screws 5, to their respective side frames. On main shaft 2, between the sideframes, is mounted a revoluble folding-bed .carrier 6, and pivotally mounted thereon are with two ears 30" 30*, Fig. 10, through which it is pivoted in carrier 6 on pin 23. Said folding-bed also has arm 31 extending therefrom inwardly toward carrrier-shaft 2. On the inward end of said arm 31 is pivotally mounted roll 32 for engagement with fixed cam 24, fast to sleeve 3 for swinging said folding-bed outwardly for coaction with complementary means for forming the diamond fold in the bag-blank. By means ofpullspring 33, one end of which is attached to the under side of folding-bed 30 and the other end to carrier 6, said folding-bed may be swung inwardly (when allowed by cam 24) in coaction with the aforementioned complementary diamond-folding means. Also said spring 33 is operative to urge roll 32 toward cam 24 for coaction therewith. Folding-bed 30 is provided with the usual front clip 25 and side clips 27 28 for holding the lower ply of the mouth of the bag-blank and the lower plies of the side tucks,respectively,to the folding-bed. The mounting of and means for actuating said front and side clips are well known in the art and are briefly as follows: Front clip 25 preferably comprises two members 25 25, pivotally mounted on pin 23 and fixed to turn therewith. Member 25 has depending therefrom arm 34, which arm has pivotally mounted at its free end roll 35 for engagement with fixed cam 36, which cam is supported on sleeve 4. By means of said cam, roll, arm, and pin, front clip 25 may be lifted from said folding-bed and by means of push-spring 26, Fig. 5, one end of which abuts against the under side of the forward end of the folding-bed and the other end against arm 34 of the front clip, said front clip may be closed, when allowed by cam 36, onto said folding-bed to grip a bag-blank thrust between them. Side clips 27 28 are pivotally mounted in brackets 37 38, respectively, oppositely disposed on folding-bed 30 and below the face thereof. Said side clips are provided with arms 47 48, respectively, extending inwardly toward axis 2 of carrier 6, and on the inward ends thereof are pivotally mounted rolls 57 58, respectively, for engagement with fixed cams 45 46, respectively, whereby said side clips may be lifted from engagement with said folding-bed. One end of pull-spring 4:1 is attached to side clip 27 and the other end to the under side of the folding-bed. Pullspring 42 is similarly attached to side clip 28 and to the opposite side of the folding-bed. By means of said springs side clips 27 28, respectively, may be closed onto the foldingbed when allowed by their respective cams to grip a bag-blank to said folding-bed.

Power may be communicated to main shaft 2 by any suitable means, as a belt and pulley. (Not shown.) By means of gear 7 on one end of said shaft power may be communicated to other parts of the machine, as hereinafter described.

The means that I have shown for feeding the bag-blank to the folding-bed are well tively, projecting from side frame 4:. Said gear meshes with gear 7 on the outer end of shaft 77, and on the inner end of said shaft is gear 71, which gear meshes with gear 70 of roll 67. The relative diameters of the gears in the train are such that rolls 66 67 will travel at the same surface speed as the folding-beds.

Above carrier 6 and suitably arranged for successive coaction with the folding-beds, supported on arm 78, projecting inwardly from side frame 3, is ironer 80. Said ironer preferably comprises two yieldable members, as 80. Said members are preferably composed of fiat rectangular pieces of steel and are bent into U shape.

Pivotally mounted on shaft 8, which shaft is fixed in the free ends of arms 9 10, is cylindrical blankopener or folding roll 11, adapted and arranged to be oscillated or revolved in coaction with the folding-beds successively to form the diamond fold of the bag-blanks. Said roll 11 is provided with a front clip 29, pivoted at 39 therein, and with side clips 51 52, pivoted in opposite sides, re-

spectively, and below the face of said roll.-

Said front and side clips are adapted and actuated to grip the upper ply of the mouth of the blank and the upper plies of the side tucks thereof, respectively, to the face of roll 11. Said roll 11 is also provided with a pair of supplementary side clips 61 62, similarly mounted and operated to side clips 51 52, for gripping the body of the bag-blank to said roll for purposes more fully hereinafter set forth. Front clip 29 is of such width and so disposed that it may pass between members 25 25" of front clip 25 of folding-bed 30 without interference, and thereby enter the mouth of the bag-blank to grip the upper ply thereof to roll 11. Said front clip 29 is fast to pivotpin 39, which pin trunnions in ears 55 56, reaching inwardly from the rim 11 of roll 11. Said pin 39 projects outwardly from ear 55 and has mounted thereon arm H, on which arm is pivotally mounted roll 63 for engagement with fixed cam 65 on shaft 8. By the foregoing means said front clip may be lifted from engagement with the face of roll 11, and thereby release a bag-blank held thereon. By means of pull-spring 60, one end of which is attached to arm 44 and the other end to web 11 of roll 11, said front clip may be closed onto the face of roll 11 or onto a bag-blank thrust thereon when permitted by cam 65. Side clips 51 and 61 have the usual inwardlyextending arms 51 and 61?, respectively, and pivotally mounted thereon rolls 51 61 respectively, for engagement with fixed cam 49 on shaft 8 to open saidlside clips. Side clips 52 and 62 are linked to side clips 51 and 61, respectively, by means of connections54 as to clips 51 52 and 64 as to clips 61 62. Said connections are attached to their respective side clips on respectively opposite sides of the clip-pivots, so that the oppositely-disposed members of each pair may be closed simultaneously and opened simultaneously. For closing side clips 51 52 pull-spring 59 is provided, having one end thereof attached to side clip 52 and the other end to the under side of rim 11 of roll 11. Said spring acts directly on side clip 52 and through connection 54 on side clip 51. Side clips 61 62 may be closed by pull-spring 69, one end of which is attached to clip 62 and the other end to the under side of rim 11 of roll 11. Said spring acts directly on side clip 62 and through connection 64 on side clip 61.

Oscillating arms 9 10, which carry shaft 8 and roll 11, are pivotally supported on sleeves 3 4, respectively. Said arms and foldingroll 11 may be oscillated about axis 2 by the following means: Toward the front of the machine and revolubly supported in bearing 12 in frame 4 is shaft 13. On the inner end of said shaft is fixed double-faced cam-disk 14, and on the outer end thereof and meshing with gear 7 is fixed gear 15. The ratio of gears 7 and 15 is such that one revolution of gear 7 will impart three revolutions to gear 15 and cam-disk 14. Pivotally supported on ear 10 of arm 10 is roll 16 for engagement with cam 14 of cam-disk 14. Arm 10 is provided with a downwardly-extending segment 10", having gear-teeth formed in the periphery thereof for engagement with similar teeth in the periphery of segment 17. Segment 17 is fixed to shaft 18, which shaft is suitably mounted for oscillation in frames 3 4. On said shaft 18 and near that end thereof opposite to segment 17 is a similar segment 19. Said segment 19 is provided with teeth for engagement with the teeth of segment 9 of arm 9, similar to segment 10 of arm 10. By means of cam 14 arm 10 may be oscillated, and through segments 10 and 17, shaft 18, and segments 19 and 9 arm 9 may be oscillated in unison therewith, whereby roll 11, pivotally supported on shaft 8 in the free ends of arms 9 10, may be oscillated with its axis in constant parallelism with the axis of carrier 6.

Roll 11 may be rotated on shaft 8 for rolling coaction with each folding-bed successively by the following means: Gear-arm 20, mounted for oscillation on sleeve 4, has at its free end a segment-like portion 20", having teeth formed therein for engagement with similar teeth formed in segment 22 on hub 11 of roll 11. On ear 20 of said arm 20 is pivotally mounted roll 21 for engagement with cam 14 of cam-disk 14 on shaft 13. By the revolution of cam 14 arm 20 may be oscillated, and through segment-gears 20 and 22 roll 11 may be oscillated on shaft 8. The contours of cams 14 14 and the ratio of segmentgears 20 and 22 are such that roll 11 may be caused to revolve on its axis 8 coincident with a clockwise turning of said axis with arms 9 10 about shaft 2, Fig. 2 and in rolling coaction with one of the folding-beds for the opening of the end of a bag-blank suitably held between them, and said roll 11 may then be caused to reverse its movements and return for similar coaction with the nextsucceeding folding-bed.

The bag-blank on which I perfer to operate with my improved machine for forming the diamond fold comprises a section of paper tubing having an inward ly-folded longitudinal tuck in each side thereof and may have two transverse creases formed therein at a suitable distance from the forward end of the blank and from each other for defining the main transverse fold and the folds for the rectangular boundary of the bag-bottom. However, neither both nor either of said creases are necessary to the practice of my invention and may be omitted, ifdesired; but their presence, particularly with some kinds of paper, improves the general quality of the product.

The operation of my improved machine is as follows: Feed-rolls 66 67 being in their initial positions, respectively, the forwardend of a suitably-prepared bag-blanksuch, for instance, as that just described-is thrust into the bite of said rolls and the machine started. Said rolls will feed the bag-blank upwardly and onto one of the folding-bedsas, for instance, folding-bed 30-and deliver the forward end of the lower ply of the bag-blank under raised front clip 25. The natural springiness of the paper of the bag-blank tendsto hold the mouth thereof open, thereby preventing the upper ply of the mouth of said blank from passing under front clip 25. Said front, clip is immediately closed onto said lower ply by spring 26, cam 36 being so shaped as to allow roll 35 on arm 34 to.fall at this point, Fig. 2. Closely following the closing of front clip 25 and before rolls 66 67 have released their hold on the bag-blank rolls 57 58 of side clips 27 28, respectively, run off the ends of their respective earns 45 46 and springs 41 42 close side clips 27 28, respectively, onto the lower plies of the side tucks, respectively, of the bag-blank. At about the same time by the clockwise travel of foldingbed 30 the upper ply of the open mouth of the bag-blank passes up over front clip 29 of roll 11, which roll then starts slowly forward in a clockwise direction with shaft 8 and arms 10 about axial shaft 2, and said roll also starts to turn in an anticlockwise direction about its own axis 8. This movement about its own axis presently causes roll 63 to run down incline 65 of cam 65, and spring thereupon closes front clip 29 onto the upper ply of the mouth of the bag-blank, folding-bed 30 continuing its clockwise movement about axis 2 and roll 11 continuing its anticlockwise movement in rolling coaction with said folding-bed until side clips 27 28, now closed, and side clips 51 52, which latter clips have been up to this time open, are opposite each other, respectively. Roll 51 now runs down to low part 49 of cam 49, and thereupon spring 59 closes clips 51 52. At the same time roll 32 of folding-bed 30 has reached low part 24 of cam 24, and thereupon spring 33 pulls said folding-bed inwardly a slight distance, and thereby distends the side tucks of the bagblank and aflords entrance therein for side clips 51 52, respectively, Fig. 4. Said inward movement of the folding-bed is not, however, necessary to the operation of my machine, as by the prolongation of the high part 49 of cam 49 in an anticlockwise direction, Fig. 5, side clips 51 52 may be prevented from closing until the side tucks of the bag-blank have been sufficiently distended by the rolling separation of folding-bed 30 and folding-roll 11 to admit the side clips therein, respectively, Fig. 5. In either case after the closing of side clips 51 52 the bag-blank will be gripped by side clips to the folding-bed and by side clips to the folding-roll, ready for the opening out of the mouth of the bag-blank and the formation of the usual triangular folds in the side tucks, respectively. Roll 32 now commences to ride up high part 24 of cam 24, thereby swinging folding-bed 30 outwardly with edge 30 thereof in coaction with folding-roll 11, Fig. 6, for the opening out of the mouth of the bag-blank in the early stages of the formation of the diamond fold. Said folding-bed continues its outward swinging until roll 32 reaches the apex of high part 24 of cam 24', and folding-roll 11 continues its clockwise movement with shaft 8 and arms 9 10 and its anticlockwise movement about said shaft 8 in continued coaction with said edge 30*, of the folding-bed, Fig. 7. Just before folding-bed 30 has reached its extreme outer position roll 61 of supplementary side clip 61 rides down to low part 49 of cam 49, and by means of spring 69 supplementary side clips 61 62 are closed onto the bag-blank, thereby gripping the same to folding-roll 11. At the same time the combined anticlockwise turning of roll 11 and the upward swinging of folding-bed 30 have completed the folding of the forward end of the bagblank down into the diamond fold and forced that part of the folded diamond lying on said foldingbed up against ironer 80, thereby slightly compressing said ironer and squeezing the bag-blank down onto said folding-bed.

Folding-roll 11 has now' reached the end of its clockwise movement in arms 9 10 about axis 2, but continues its anticlockwise movement about its own axis 8 just enough farther to cause roll 63 to mount rise 65 of cam 65 and roll 61 to mount rise 49 of cam 49, each a suflicient amount to lift front clip 29 and side clips 61 62, respectively, and free the folded bag-blank from roll 11. The freeing of the bag-blank from said roll is facilitated by the pressing thereof by the ironer into the depression X caused by the relative positions of folding-roll 11 and folding-bed 30, as in Fig. 7. Said pressing tends to cause that part of the bag-bottom lying on roll 11 to spring up therefrom. Folding-roll 11 has now reached the end of its anticlockwise r0- tation about its axis 8. It thereupon stops and then reverses the direction of its rotation to a clockwise direction and by means of clips 61 62 draws the bag-blank backwardly in coaction with the inward swing of foldingbed 30, Fig. 8. These relative movements are continued until folding-bed 30 has returned to its normal position, with its face substantially coincident with the periphery of carrier 6 and until roll 61 mounts rise 49 sufliciently to lift side clips 61 62 and free the bag-blank entirely from roll 11, Fig. 9. Folding-bed 30, with the diamond folded bagblank thereon, then continues its clockwise movement about axis 2 until roll 35 of front clip 29 mounts end 36* of cam 36 and rolls 57 58 of side clips 27 28, respectively, mount ends 45 46 of cams 45 46, respectively, thereby lifting front clips 25 and side clips 27 28, respectively, and freeing the diamondfolded bag-blank. The subsequent creasing, pasting, and folding of the end flaps for the completion of the bag-bottom may then be done by any convenient means. Shortly before the release of the diamond-folded bagblank by the front and side clips of foldingbed 30 folding-bed 50 passes up in its rotation about axis 2 into position to receive a bag-blank from rolls 66 67, and arms 910 continue their anticlockwise movement, and roll 11 continues its clockwise movement until said roll is returned to its initial position,

ready to repeat its operation in coaction with said folding-bed 50.

I claim- 1. The combination of a revoluble carrier 6, an oscillatable folding-bed 30 mounted thereon, a pair of side clips on the folding-bed, a folding-roll 11 oscillatable about its own axis and about the axis of the carrier, and a pair of side clips 51, 52, and a front clip 29 on the folding-roll; all combined and operating together substantially as described.

2. The combination of a revoluble carrier 6, an oscillatable folding-bed 30 mounted thereon, a pair of side clips on the folding-bed, a folding-roll 11 oscillatable about its own axis and about the axis of the carrier and a pair of side clips 51, 52 on the folding-roll, all combined and operating together, substantially as described.

3. The combination of a revoluble foldingbed mounted for oscillation toward and away from its axis of revolution, a pair of side clips on the folding-bed, a folding-roll 11 oscillatable about its own axis and about the axis of revolution of the folding-bed and a pair of side clips 51, 52 on the folding-roll all combined and operating together substantially as described.

4. The combination of a revoluble foldingbed mounted for oscillation toward and away from its axis of revolution, a pair of side clips on the folding-bed, a folding-roll l1 oscillatable about its own axis and about the axis of revolution of the folding-bed and two pairs of side clips 51, 52 and 61, 62 respectively on the folding-roll all combined and operating together substantially as described.

5. The combination of a revoluble foldingbed mounted for oscillation toward and away from its axis of revolution, a pair of side clips on the folding-bed, a folding-roll 11 oscillatable about its own axis and about the axis of revolution of the folding-bed, side clips 51,

52 on the folding-roll and an ironer 80 all combined and operating together substantially as described.

6. The combination of a revoluble carrier 6, an oscillatable folding-bed 30 mounted thereon, a pair of side clips on the folding-bed, a folding-roll l1 oscillatable about its own axis and about the axis'of the carrier, a pair of side clips 51, 52 on the folding-roll and an ironer 80,2111 combined and operating together, substantially as described.

7 The combination of a revoluble carrier 6, an oscillatable folding-bed 30 mounted thereon, a pair of side clips and a front clip on the folding-bed, a folding-roll 11 oscillating about its own axis and about the axis of the carrier, and a pair of side clips 51, 52, and a front clip 29 on the folding-roll; all combined and operating together substantially as described.

In testimony whereofI have signed my name to this specification, in the presence of two sub scribing witnesses, this 24th day of May, 1904:.

HERMAN ELSAS. 

